High confidence for unsettled weather conditions up to Thursday, but moderate for timings of rain and details.
Progress will be impeded by very strong winds. Walking will be difficult and strenuous at times with a potential for one to be blown over in gusts. There can be a marked increase in winds through cols or on exposed ridges and summits. Distances often take longer to cover with compass bearings becoming more difficult to follow accurately.
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
Prolonged exposure to heavy rain can result in drenched clothing and a risk of hypothermia if not wearing good quality waterproofs. Terrain may turn increasingly boggy underfoot, while mountain streams will rapidly rise into spate and may become impassable. There may also be a risk of flooding in valleys or glens. If there is snow cover, a heightened avalanche hazard is possible and avalanche reports should be consulted where available.
Expect snow to rapidly accumulate with deep drifts also possible during windy conditions. Progress will be time consuming and physically strenuous, which will significantly affect the distance one is able to travel on foot. Paths will become hidden and difficult to follow, while very poor visibility during snowfall will make route-finding challenging. A heightened avalanche risk is likely and avalanche reports should be consulted where available.
Walking will be very strenuous with any mobility virtually impossible over exposed ground. There is a high likelihood of being blown over or taken off one’s feet, while even standing up may be impossible at times. Basic tasks such as using a map, eating, putting on extra clothing or communication become extremely difficult away from any shelter.
A cloudy start with rain, but brighter later with scattered heavy showers.
|Chance of precipitation|
|1300m||S 45 54||SW 55 65||SW 39 49||SW 53 67||SW 45 57||SW 37 46|
|900m||S 31 40||SW 35 45||SW 28 38||SW 40 53||SW 36 47||SW 29 39|
|600m||S 43 50||SW 45 54||SW 32 40||SW 44 57||SW 36 48||SW 30 38|
|300m||S 19 26||S 23 34||SW 16 25||SW 25 42||SW 19 33||SW 15 25|
|Glen||SW 11 24||SW 12 28||SW 12 25||SW 17 39||SW 15 34||SW 8 21|
Persistent, often heavy rain through the morning, gradually turning to sleet then snow over the highest summits. Rain turns patchy in the afternoon, with snow above 600m. Becoming dry across Argyll early evening, then all ranges by late evening. Heavy rain, snow above 700-900m, spreads across all ranges by midnight.
Nil through the morning with persistent cloud above 300m. Becoming 40% in the afternoon as cloud lifts, giving occasional cloud above 600-800m.
Poor or very poor through the morning. Occasionally good in the afternoon.
Gales or severe gales (gusts up to 70mph at tops) are possible.
Cloudy and windy overnight with a period of heavy rain (snow above 1000m), this clearing by the morning with scattered showers following, these becoming less frequent later in the day. These will be wintry above 500m.
Southwest 50mph gusting 70mph overnight, but dropping to 30mph gusting 45mph later in the day.
Periods at 500m with 30% of the tops cloud-free.
Generally good, but moderate in rain and occasionally poor in snow later.